Absolute neutron yield measurement using divertor NFM. Kaschuck Yu.A., Krasilnikov A.V., Prosvirin D.V., Tsutskikh A.Yu. SRC RF TRINITI, Troitsk, Russia. 11.04.2006 ITPA-10 Troitsk, Moscow reg., Russia.
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Absolute neutron yield measurement using divertor NFM
Kaschuck Yu.A., Krasilnikov A.V., Prosvirin D.V., Tsutskikh A.Yu.
SRC RF TRINITI, Troitsk, Russia
11.04.2006 ITPA-10 Troitsk, Moscow reg., Russia
Cf, Am-Be – well-know neutron spectrum, constant neutron yield, isotropic emission
compact switchable fusion neutron source (d-t, d-d)
ITER discharges with well-know plasma parameters: total neutron yield, plasma position, ion temperature and fuel density profile, etc.
Commercial available 252Cf neutron sources produced by
“Research Institute of Atomic Reactor”, Dimitrovgrad, RF
252Cf neutron sources
<En> = 2.14 MeV
neutron yield up to 1011 n/s;
sealed tube lifetime 100-500 hours;
mass30 - 100 kg;
Yn ~ 1011n/s
TFTR DT neutron generator
Yn ~ 108 n/s
A. L. Roquemore
9 ITPA Daejeon, Korea, Oct 2005
DNFM calibration analysis with MCNP 4C code:
DNFM calibration: neutron group fluxes produced by 14MeV neutron source moving along VV axis
DNFM calibration: neutron group fluxes produced by 252Cf source moving along VV axis
DNFM calibration: fast and direct neutron fluxes vs toroidal angle for point DT neutron source moving along VV axis
DNFM calibration: relative count rate in case 1,2 and 3 NFM at the divertor for 14 MeV neutron source along VV axis
Crossing of factory test, NTA calibration and operation range
for NFM based on fission chambers.
Requirements for in-vessel calibration